ptrdiff_t - count of elements or array index

NAME  LIBRARY  SYNOPSIS  DESCRIPTION  STANDARDS  HISTORY  SEE ALSO 

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NAME

ptrdiff_t − count of elements or array index

LIBRARY

Standard C library (libc)

SYNOPSIS

#include <stddef.h>

typedef /* ... */ ptrdiff_t;

DESCRIPTION

Used for a count of elements, or an array index. It is the result of subtracting two pointers. It is a signed integer type capable of storing values in the range [PTRDIFF_MAX, PTRDIFF_MAX].

The length modifier for ptrdiff_t for the printf(3) and the scanf(3) families of functions is t, resulting commonly in %td or %ti for printing ptrdiff_t values.

STANDARDS

C11, POSIX.1-2008.

HISTORY

C89, POSIX.1-2001.

SEE ALSO

size_t(3type)

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